Risk-neutral measures find extensive application in the pricing of derivatives. Indifference to risk. The risk-neutral investor would be in the middle of the continuum represented by risk-seeking investors at one end, and risk-averse investors at the other extreme. Risk-neutral measures find extensive application in the pricing of derivatives.
Macrophages are highly specialized in removal of dying or dead cells and cellular debris. This role is important in chronic inflammation, as the early stages of inflammation are dominated by neutrophil granulocytes, which are ingested by macrophages if they come of age (see CD31 for a description of this process).
Nutrition and the cellular membrane. The envelope that encapsulates the cell is referred to as the cellular membrane. The cell membrane serves as the structural boundary that encloses each of your cells and keeps their internal machinery (like the energy producing reactions) safe, so they can function properly.